Solisphaeridium lucidum (Deunff, 1959) Turner, 1985

Originally Hystrichosphaeridium, subsequently Baltisphaeridium (an acritarch genus), thirdly (and now) Solisphaeridium.
Holotype: Deunff, 1959, pl.9, fig.82
Age: Ordovician (Caradoc)